Getting ready to start my second season running a classic 18 on the West end of Lake Erie. 5.7 l Vortec (Moterz) attached to Alpha Drive. Ran a 23 P Solas prop up to 61.5 mph gps. Purchased an older Sold hub Mirage Plus (no venting holes). Installed the prop with the mercury thrust washer and had 1/8" of spline left for locking washer.
Tried to install prop with out thrust washer and it seams to go in to far.
The front of the prop has an offset of apox 1/4" and it looks like some kind of washer is required.
Prop spins better with the thrust washer.